Geometry: Common Core (15th Edition)

by
Charles, Randall I.

Answer

80

Work Step by Step

Angles of a triangle add up to 180 degrees. Therefore, based on the extended proportion 4:3:2, we can set up an equation to solve.
4x+3x+2x=180 degrees
9x=180
x=20
Substitute 20 in for x to get the angles
80
60
40
The largest angle is 80 degrees.